Alberto is Starman3's fan character in his bloopers. He is the other brother of Mario and Luigi, the third brother.
Alberto hasn't appeared much outside of Starman3's bloopers. He did make a notable appearance in a Gangnam Style music video, where many confused him for Supermarioglitchy4.
He debuted in Blooper 11. He is generally portrayed as Mario and Luigi's third brother and has a major but still less active role than his two brothers throughout the series until Season 4. After that, his usual appearances have been rare, but always with his two other brothers.
Alberto appears when Pink returns to Mario after she sees some energy at the castle she was at that concerned Mario's explanation. Alberto finds some members who were in the tower, and runs out to tell the others that. When Vindimka appears and starts talking, he assumes the protection he's talking about is invincibility frames. He seems very attached to the mission like his two brothers, and agrees with Pink that splitting up is a good idea since they can clear more ground.
It was revealed he actually went to Wet-Dry World and got trapped. He was rescued by MarioMario54321 and reunited himself with Mario and Luigi.
Counterparts and Other Relevant Characters
- Fourth Dimensional counterprart: Fourberto
- Star World counterpart: Starberto
- Crown Dimension counterpart: Fiberto